Study on stress distribution and failure criterion of the roof for the severely inclined coal seam under long wall working

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• 作者：Xiang-rui Meng (1)
  Zhao-ning Gao (1)
  Xiang-qian Wang (1)
  
• 关键词：stress distribution ; severely inclined coal seam ; failure criterion
• 刊名：Journal of Coal Science and Engineering (China)
• 出版年：2012
• 出版时间：June 2012
• 年：2012
• 卷：18
• 期：2
• 页码：118-122
• 全文大小：665KB
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  12. Zhang J F, Shi P W, Zhang H M, 2008. The buckling failure of the roof of the severely inclined seam in caving. / Journal of Xi鈥檃n University of Science and Technology, 28(2): 392鈥?96.
  13. Zhang J F, Shi P W, Zhang H M, 2009. Stability analysis of basic roof after first destruction in the steep seam. / Journal of China Coal Society, 34(9): 1160鈥?164.
  
• 作者单位：Xiang-rui Meng (1)
  Zhao-ning Gao (1)
  Xiang-qian Wang (1)
  
  1. School of Energy and Safety, Anhui University of Science and Technology, Huainan, 232001, China
  
• ISSN：1866-6566

文摘

By turning to the theory of elastic thin plates, a mechanical model of the main roof breaking for severely inclined seam under long wall working was esbalished, in which formulaes were deduced for the calculation of the stress distribution. When the main roof stress distribution was characterized, the failure form of the roof in the long wall coal seam under work was given with the failure criterion deduced. The deduced failure criterion was then applied to the No.3232(3) face of the Lizuizi Coal Mine; the first pressure for the working face was accurately predicted. Results of the field application show that the main roof of the severely inclined coal seam under long wall working breaks in the O-X pattern, which is basically in accordance with the reality.